George cooper



.twitch tette `1mr @ffifp vsented. the greatest liiiliculty.`

GEORGE coornitfor NEW-YORK, N.-Y., Assieme-'To VICTOR E. y'Mii,UGER,

` or sA'MnimA'onv Letters Patient Nor 78,98?, clmtcol June 16, 1868.

I Inrnorennrr .1N LITHoenArn-Ic PRESSES,

To 'ALL' W'OM '1T MAY CONCERN:

`Bc it known that 1,: GEORGE COOPER, of the-city, county, andStatc of NewYork, have inveutcdoI new improved Damping-Apparatus for' LithograpliicMac'bines andPr'esses; and4 I do hereby declarc'that the following is a full, clear,4and exact description ftherco', whicb'ivillenablc others skilled inthe art to make and' use the same, reference' being had to tbeueconipanying drawings, forming part ofthis specification, in'which- Figure 1 representsaplan ortopview of my improved damping-apparatus'. A Figure 2 is a longitudinal vertical section'of the saine, taken on the'plane of the line'izl', lig. 1. Figure -3 is o; vcr-tical transverse section ofthe suma, taken on lthe plane ofthe line y y, hg. 2. Figure lis a detail"verticalsection",takenon the planeof th line z' z, lig., Similarletters of reference indicate corresponding parts. This invention relates to a. new device for damping the printing-surface and the edges of lithographie' stones automatically, so 'that in machine lithographie printing, the required moisture may beimparted to the stone. Evcrl'since the introductionofmachine lithographie printing, therproper equal moistening of thev'stones has pre- Myinventic'n consists, rst, in the use ofa'water-reservoir with-a slotted bottom, in which felt, blanket, or other ponsfabre is clamped, so as to conduct the water belowthe rservoirrwith the requisite slowness. The said `fabric or swab cen'be clamped by suitable -mechanism, 'so that theI dischargeof Water from the reservoir can be regulated at pleasure.` i v l The invention also consists in securing-the lithographie stone upon al'movable carriage, and inrxinyg'lrlpon the same carriage another s'toneror slab, which receives the moisture from the aforesaid swab'projecting from i the water-reservointo transfer it to-tbe'.printingstone.

Y tbeirequivalent, as indicated.v l

VThe invention also consistsrin the arrangement. and construction of a series of revolving or'other porous Wipers or rollers,.whicl1 take'themoisture from thev surface and edgesof the slab and transfer it thence to the surface and edges of the printing-stone.`

.A, in' the drawing, represents a. trough, cistcrn, orvsuitable waterreservoir, itted to suitable supports, and

basing a slotted bottom, ,as shown in fig. 2,. The width of the'sletis adjustable-by means of set-screwed a, or

i Through the slot in vthe vcsselrA ispas-s-edr,

Y(inmaterial, Bfhy which the water is sloivlycairied to the lovier extremity of such filling. `The said fill-ing B muy be made'in lsingl'edouble, or more layers, may terminate belovv the vessel A in a bag, which is filled with sponge, ,ercrother suitablev material, or. may be otherwise arranged, as may be desired.

C represents a sliding carriage, moving under the vvessel A upon suitable rails. Upon -the carriage C is a woollenffeltecbor other suitable porous and absorbing fabric secured, near to that-end'which is furthest from the vessel A, `the printing-stone D, and inline ivith the same,

nearer to the vessel A, another stone, E, of similar size as the stone-D, as shown. During the reciprocating l i r .l motion of the carriage the slab E passes under thc cloth; B, and receives moisture from the same.

F isa'horizohtal roller,ilittecl in bearings, hereafter described, and covered with felt, or other suitable absorbingmaterial. Aslthe slab E passes, fromd under the cloth B, it comes beloiv the`rolle F, which absorbs the moisture from the slab.

G is a horizontal wiper, covered witlifspongc,-or other suitable Inateriul. The roller F and wiper G have theirrbearings in plates b b, Which-fare dranin down by means of springer, asin fig, 4, so that the roller F and WiperG may-always be drawn upon the. snrfaces .of the stones. lhe wiper G is .drawn so much down that it will come in contact withtherfrontand back edges of the slab, so us to absorb the moisture from the same.

`H arepiccesfof sponge, or other absorbing-material, which are fitted to thelower ends of adjustable bars or springs d d, and which are to `wipe the side edges of the slab.

The joints of' the vessel A are kept tight means of suitable rubber packing, as shown.

The operatiouis as follows: As the carriage moves in the direction of the arrow 1,'fig. 2, the slab-E iS broughtfuuder the cloth, B, and is wettedv'by the same, the set-screws a regulating the quantity of water deposited upon theslab. The carriage' is then moved in the direction of arrow 2, fig. 2, and the slab E is still more wetted. I 'Anlelastic plate, I, is arranged infront of thetrough A, so as to sweep over thesurfaee of the slab vas the same' moves under it. The object ofthe plate I is to distribute the moisture evenly upon'the surfacebf the slab, and to remove the surplus. v v

During its continued motion in the direction of 'the arrow 2, the slab arrives under the wipers H, which l take the moisture from its side edges, then under the roller F, which absorbs the moisture from the surface, and

finally under and against the wiper G, which absorbs-it from the back and frontedges. The motion of the carriage is then again reversed, and the slab passes once more under all the rollers an wipers','which complete their respective services, and then the. stone D arrives` under the same roller 1?, and

under the wipers G, H which give oft' their moisture to the stone and to its edges. i I

Thus the stone is automatically damped, thedegreeof moisture being easily regulated by the set-screws .a a, or .their equivalents, and by the up-anVd-down adjustable wiper I, the` manner of attachment of which fully shown in iig. 3. v

The bars d, from which theuwipers H are suspcnded,work up and down adjustably in slotted plates e, so

ythat the said wipersH may be adapted to stones of greater or less wid-th and thickness.

` Having thus described my invention, what claim as new, and desire to secure by Letters Patent, isn

1. Wetting' a lithographie storie bysmoistening the surface'of another stone, .and transferring the moisture from the same to the printing-stone, as described. y. il

2. Wettingfa lithographier stone by means ofl a moist roller or rollers, F, and wipers H H, G, un'der and between which the stone passes, substantially as described. y

3. The Water-containing vessel A, when provided withan adjustable slot that is filled' with absorbing- 'material or fabric B, substantially as herein shown and described.

4. The up-and-downv adjustable elastic plate I, when arranged as set forth, for the purpose o'i` equally disf l tributing the moisture over the slab E, in themanner specified.

5. Securing the wipers-H Hto adjustable bars or springs d d, for the purpose of adapting the machine to .stones of greater. or less width and thicliness, as specified.

6. The combination of the slotted vessel A, cloth, B, screws, or their equivalents, a, carriage C, stones E, wipers F, G', and H, and distributor I, with each other and' with the stone, D, all made and operating substam tially as'and for the purpose herein shown and described. Y

The above specification of my invention signed by me, this 25th da'y of November, 1867.

GEORGE COOPER. 

